Does loud music affect the way students are able to learn their lessons?
The affect of music on learning has been widely researched and there is a lot of variation in performance based on the type of music and the setting where it is used.
There can be no two answers on the question whether loud music hampers study. Loud music only distracts students and diverts their attention from their work. But other research is less conclusive.
In the case of educational programs on television, music has been found to be able to maintain the concentration and attention of listeners and therefore is useful. A preliminary study of the affect of music on students while they are doing homework shows that light music of the students' choice improves performance, though TV shows have been found to be very distracting. In a classroom setting also light music was found to improve performance.
Though inconclusive, the research done till now does suggest a correlation between better performance while light music is being played in the background.
There is a general consensus in the scientific community that "loud volume slows down our ability to memorize and do other brain functions by constricting the flow of blood to the brain" (see reference link). Generally speaking, loud music is not conducive to learning. However, it's important to keep in mind that the term "loud" is ambiguous because it refers to our perception of sound, and that perception varies from person to person. Some studies seem to suggest that soft music may enhance thinking and learning ability, but the results remain inconclusive.
It depends on the student of course. A lot of students have trouble concentrating and it would be a distraction. For me music helps me learn. That's how i do homework or study for a test...i listen to music while i work :)